Makita BL1815-2 18-Volt 1-1/2 Ah Compact Lithium-Ion Battery, 2-Pack (Discontinued by Manufacturer) - Power Drill Accessories - Amazon.com
Running a Makita 18V 2Ah (also tried a 9Ah) battery to a voltage reducer on my sons Peg Perego ground force tractor. Everything besides 2nd gear works. When I remove the reducer
21v Rechargeable Lithium Ion Battery,for 18v Makita Battery interface,2Ah 4Ah 6Ah For Makita Electric Power Tool with EU Charger - AliExpress
Makita Battery Adapter to Mastercraft – Power Tools Adapters